The Center for American Progress is recommending 13 new gun policies to the White House — some of them executive actions that would not require the approval of Congress — in what amounts to the progressive community’s wish list. CAP’s recommendations, presented Friday to White House officials and detailed in an 11-page report obtained by The Washington Post, establish a benchmark for what many in Obama’s liberal base are urging him to do after last month’s massacre at an elementary school in Newtown, Conn. CAP’s proposals — which include requiring universal background checks, banning military-grade assault weapons and high-capacity ammunition...